JavaScript SDK enables you to access all of the features of the Graph API via JavaScript, and it provides a rich set of client-side functionality for authentication and sharing. It differs from Facebook Connect.

JQuery is a fast, concise, JavaScript Library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your web pages. jQuery is designed to change the way that you write JavaScript.

Indicates the resolution (pixel density) of the output device. The resolution may be specified in either dots per inch (dpi) or dots per centimeter (dpcm). Used to change CSS based on output resolution.